What is 0.4^-2 (0.4 to the power of - 2) ?

N a 30°-60°-90° triangle, the length of the hypotenuse is 30. Find the length of the shorter leg.

I used 8 bags of sand for 12m squared how much will I need for 15 m squared

A regular pentagon and an equilateral triangle have the same perimeter. The perimeter of the pentagon is 5 (1/2 x + 2) inches. The perimeter of the triangle is 4 (x-2) inches.

Does the algebraic expression contain like terms? if so what are the like terms

In the diagram, which pair of angles are vertical angles? 87 o 21 and 22 24 and 26 26 and 28 25 and 23

What's the sum of - 4 and 14

If a cube has a volume of 64 cubic units how long is its edge?

Which of the following are solutions to the equations below? x^2+x-20=0

What does the 3 represent in 3 (20 15) ?

the beach shop sold 12 skim boards on saturday and 9 on sunday. What is the percent of decrease from saturday to sunday?